Implementation of ATM OAM functions for the integrated service access network

As the various types of application services are increased in the ATM (Asynchronous Transfer Mode) network, it becomes very important requirement for ATM network equipment to provide for higher transfer rate and to detect the network failure or the service degradation. In order to meet these requirements we develop a monolithic single chip device which can handle VP/VCI address translation, cell appending, counting, and OAM (Operation and Management) processing for 65,536 VCs (virtual circuits) in real time. This paper describes architectural design of a 622 Mbps ATM Layer ASIC (Application Specific Integrated Circuit) under development. This ASIC is applicable to develop the network equipment in B-ISDN. This supports both NNI (Network-Network Interface) and UNI (User Network Interface) and has ITU-TS based F4 or F5 level OAM functions processing in real time. Also this chip can measure QOS (Quality Of Service) and network parameters related to such OAM functions.